242115407 has 4 divisors (see below), whose sum is σ = 242879496. Its totient is φ = 241351320.

The previous prime is 242115397. The next prime is 242115437. The reversal of 242115407 is 704511242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704511242 = 2 ⋅352255621.

It is a cyclic number.

It is not a de Polignac number, because 242115407 - 2⁸ = 242115151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242115437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381569 + ... + 382202.

It is an arithmetic number, because the mean of its divisors is an integer number (60719874).

Almost surely, 2^242115407 is an apocalyptic number.

242115407 is a deficient number, since it is larger than the sum of its proper divisors (764089).

242115407 is an equidigital number, since it uses as much as digits as its factorization.

242115407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764088.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 242115407 is about 15560.0580654444. The cubic root of 242115407 is about 623.2670132255.

Adding to 242115407 its reverse (704511242), we get a palindrome (946626649).

The spelling of 242115407 in words is "two hundred forty-two million, one hundred fifteen thousand, four hundred seven".